Question: Which Brazilian dam failure left the most missing people?
Paraphrase: Name the dam failure which occurred in Brazil that had the greatest amount of unaccounted for individuals.
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q1033074 . ?ent wdt:P1446 ?obj . ?ent wdt:P17 wd:Q155 } ORDER BY DESC(?obj)LIMIT 5